<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    const dest = {
        set a(val){
            console.log(val)
        }
    }
    dest.a = 12;

    let {constructor:c} = 4;
    console.log(c,c === Number)

</script>

</body>
</html>